Author Question: Many outdoor air contaminants originate from various sources. The PHN recognizes that sources such ... (Read 27 times)

londonang · **on:** Jul 8, 2018

Many outdoor air contaminants originate from various sources. The PHN recognizes that sources such as gas stations, dry cleaners, commercial building heating and cooling systems, and waste disposal facilities are referred to as

A. Criteria air pollutants
B. Area sources
C. Mobile sources
D. Point sources

Question 2

A PHN knows that the ambient air standard, which is the highest level of a pollutant in a specific place over a specific period of time that is not hazardous for humans, is most influenced by

A. Wind
B. Weather
C. Population
D. The surrounding built environment